<template>
  <div class="courseContainer" v-loading="loading">
    <div class="courseInfoTop">
      <div class="info-container">
        <ul class="route">
          <li class="route-item" style="cursor: pointer">
            <router-link to="/course" style="color: #fff">课程</router-link>
          </li>
          <li class="route-item"><el-icon><arrow-right /></el-icon></li>
          <li class="route-item" style="cursor: pointer">
            {{ courseInfo.discountPrice==0 ? '免费课' :'会员课' }}
          </li>
          <li class="route-item"><el-icon><arrow-right /></el-icon></li>
          <li class="route-item">{{ courseInfo.courseName }}</li>
        </ul>
        <div class="name">{{ courseInfo.courseName }}</div>
        <div class="info">
          <div class="Avat">
            <img src="@/assets/img/Avat62.png" alt="" />
          </div>
          <ul class="teacherName">
            <li class="name-item">
              {{ courseInfo.courseName }}
              <img src="@/assets/img/teacherStart.png" alt="" />
            </li>
            <li class="name-item">金牌讲师</li>
          </ul>
          <ul class="access">
            <li class="access-item">难度</li>
            <li class="access-item">{{courseTypeFn(courseInfo.courseLevel) }}</li>
            <li class="access-item">·</li>
            <li class="access-item">时长</li>
            <li class="access-item">{{courseInfo.totalHour}}个小时</li>
            <li class="access-item">·</li>
            <li class="access-item">学习人数</li>
            <li class="access-item">{{courseInfo.purchaseCounter + courseInfo.purchaseCnt}}人</li>
            <li class="access-item">·</li>
            <li class="access-item">综合评分</li>
            <li class="access-item">10.00</li>
          </ul>
        </div>
      </div>
    </div>

    <div class="info-nav">
      <div class="nav-container">
        <div class="chapter-item" @click='active=true'>
          <div :class="active?'active1':''">章节</div>
          <div class="line" :class='active?"active2":""'></div>
        </div>
        <div class="chapter-item" @click='active=false'>
          <div :class="!active ? 'active1':''">下载资料</div>
          <div class="line" :class='!active ? "active2" : ""'></div>
        </div>
      </div>
    </div>
    <div class="course" v-if='active'>
      <div class="main">
        <div class="introduction">
          <div class="desc">
            该课程暂无介绍
          </div>
          <div class="btn">
            <button class="btn-item active">立即购买</button>
            <button class="btn-item" @click="addCart">加入购物车</button>
          </div>
        </div>
        <div class="video" v-for="(item,index) in courseChapters" :key="item.id">
          <div class="chapterName">{{ item.chapterName }}</div>
          <div class="chapterDesc">{{ item.description }}</div>
          <ul class="videos">
            <li class="video-item" v-for="(k,i) in item.children" :key="k.id">
              <div class="video-itemIcon">
                <i class="el-icon-video-camera"></i>
              </div>

              <div class="item-name">
                <span class="shipin">视频：</span>
                <span class="chapterName">{{ k.chapterName }}</span>
                <span class="free" v-if='k.publicType==2'>试看</span>
              </div>
              <button class="btn-learn" @click="goPlay(item,k.id)">开始学习</button>
              <div class="clearfloat"></div>
            </li>
          </ul>
        </div>
      </div>
    </div>
    <div v-else>
      <div v-if='attachments.length > 0'>
        <div class="down" v-for='item in attachments' :key='item.id'>
          <div class="source">
            <span class="downloadCourse">{{ item.attachmentName }}</span>
            <button class="downloadbtn" @click="downloadSource(item)">下载资料</button>
          </div>
        </div>
      </div>
      <div v-else>
        <el-empty image="@/assets/img/course-empt.png" description="该课程暂无资料"></el-empty>
      </div>
    </div>
  </div>
</template>

<script setup>
import { useRoute, useRouter } from 'vue-router'
import { getCourseDetail, courseCheckAuth, downloadAttachment } from '@/utils/api/courseManage'
import { reactive, ref } from 'vue'
import courseTypeFn from '@/mixins/courseType'
import { useUserStore } from "@/stores/user";
import { ElMessage } from 'element-plus'
import { createToken } from '@/utils/api/createToken'
import { addShopCar } from '@/utils/api/cart'
const route = useRoute()
const router = useRouter()
let loading = ref(false)
let courseInfo = reactive({})
let courseChapters = ref([])
let courseId = route.params.id
//判断章节跟下载资料
let active = ref(true)
let attachments = ref([])
//获取课程详情
getCourseDetail({ courseId }).then(res => {
  courseInfo = res.data.data
  courseChapters.value = res.data.data.bizCourseChapters
  attachments.value = res.data.data.bizCourseAttachments
})

//下载资料
const downloadSource = (item) => {
  //判断是否登录状态,如果不是就去登录页
  if (useUserStore().token) {
    //判断有没有权限
    courseCheckAuth({ courseId: item.courseId }).then(res => {
      if (res.data.data.hasAuth) {
        loading.value = true
        //下载文件流
        downloadAttachment({
          courseId: item.courseId,
          attachmentId: item.id
        }).then(res2 => {
          const blob = new Blob([res2.data]);
          let fileName = item.attachmentName;
          let fileUrl = item.attachmentUrl;
          const extName = fileUrl.substring(
            fileUrl.lastIndexOf('.')
          );
          fileName = fileName + extName;
          const link = document.createElement('a');
          link.download = fileName;
          link.target = '_blank';
          link.style.display = 'none';
          link.href = URL.createObjectURL(blob);
          document.body.appendChild(link);
          link.click();
          URL.revokeObjectURL(link.href);
          document.body.removeChild(link);
          loading.value = false
        }).catch(err => {
          loading.value = false
        })
        //下载
      } else {
        ElMessage.warning('购买课程才可以下载资料')
        return
      }
    })
  } else {
    ElMessage.warning('请先登录')
    router.push('/login')
  }
}

//开始学习
const goPlay = (item, chapterId) => {
  console.log(item, chapterId);
  //判断是否登录状态,如果不是就去登录页
  if (useUserStore().token) {
    //判断有没有权限
    courseCheckAuth({ courseId: item.courseId }).then(res => {
      if (res.data.data.hasAuth) {
        router.push({
          path: `/course-play/${item.courseId}/${chapterId}`
        })
      } else {
        ElMessage.warning('购买课程才可以下载资料')
        return
      }
    })
  } else {
    ElMessage.warning('请先登录')
    router.push('/login')
  }
}

//加入购物车
const addCart = () => {
  createToken().then(res => {
    let token = res.data.token
    addShopCar({
      courseId,
      memberId: useUserStore().userInfo.id
    }, token).then(res2 => {
      console.log(res2);
      ElMessage.success('添加购物车成功')
    })
  })
  // console.log(111);
}
</script>
<style scoped>
.courseContainer {
  width: 100%;
  height: 100%;
  background: #f8fafc;
  overflow: hidden;
}
.main {
  margin: 40px auto;
  width: 1200px;
  height: 100%;
}
.courseInfoTop {
  width: 100%;
  height: 200px;
  background-image: url("@/assets/img/courseInfobg1920.png");
}
.nav-container {
  width: 1200px;
  margin: 0 auto;
  color: #333333;
  display: flex;
}
/* .chapter-item  .active{
    color: #388FFF;

} */
/* 背景部分开始 */
.courseInfoTop .info-container {
  margin: 0 auto;
  width: 1200px;
  height: 200px;
  color: #ffffff;
  z-index: 5;
}
.route {
  /*margin-left: 50px;*/
  padding-top: 20px;
  display: flex;
  font-size: 14px;
}
.route .route-item {
  margin-right: 10px;
}
.name {
  margin: 30px 0 10px 0px;
  font-size: 24px;
}
.info {
  display: flex;
  /*margin-left: 50px;*/
}
.info .Avat {
  width: 60px;
  height: 60px;
  border-radius: 50%;
}
.info .Avat img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
}
.teacherName {
  margin: 8px 0 0 8px;
}
.name-item img {
  width: 14px;
  height: 14px;
}
.access {
  margin: 0 0 0 100px;
  display: flex;
}
.access .access-item {
  margin-right: 10px;
  line-height: 60px;
}
/* 背景部分结束 */

/* 导航栏开始 */
.info-nav {
  width: 100%;

  background: #ffffff;
  box-shadow: 0px 3px 6px rgba(0, 0, 0, 0.16);
}
.course {
  margin: 0 auto;
  width: 1200px;
}
.chapter {
  display: flex;
  font-weight: 600;
  color: #333333;
  margin-left: 50px;
  font-size: 20px;
}
.chapter-item {
  padding-bottom: 8px;
  font-size: 20px;
  font-weight: bold;
  line-height: 80px;
  margin-right: 70px;
  cursor: pointer;
  position: relative;
}
.chapter-item .active1 {
  color: #388fff;
}
.chapter-item .active2 {
  position: absolute;
  width: 70%;
  top: 63px;
  left: calc(30% / 2);
  height: 4px;
  background: #388fff;
  border-radius: 2px;
}

/* 导航栏结束 */
/* 课程介绍开始 */
.introduction {
  /*margin-left: 50px;*/
  /*padding: 20px;*/
  width: 1210px;
  background: #ffffff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0px 3px 6px rgba(0, 0, 0, 0.09);
}
.desc {
  padding: 20px;
  color: #474747;
  line-height: 35px;
}
.btn {
  float: right;
  margin-top: 10px;
  padding: 0 20px 20px;
}
.btn-item {
  width: 120px;
  height: 40px;
  /*margin: 0 20px 0 0;*/
  padding: 0px;
  border: 0px;
  outline: none;
  color: #f11d1d;
  border-radius: 23px;
  cursor: pointer;
}
.btn .active {
  background: #f11d1d !important;
  color: #ffffff;
  margin-right: 10px;
}
/* 课程介绍结束 */

/* 视频目录开始 */
.video {
  margin: 20px 0;
  padding: 20px;
  width: 1170px;
  background: #ffffff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0px 3px 6px rgba(0, 0, 0, 0.09);
}
.video .chapterName {
  font-weight: bold;
  font-size: 20px;
  color: #333333;
}
.video .free {
  padding-left: 20px;
  font-size: 14px;
  color: #388fff;
}
.chapterDesc {
  margin: 10px 0;
  font-size: 13px;
  color: #5c5c5c;
}
.video-item {
  height: 40px;
  line-height: 40px;
  padding: 5px 0;
  /*margin: 0 0 10px 0;*/
  border-radius: 8px;
}
.video-item:hover {
  cursor: pointer;
  background: rgba(53, 133, 255, 0.2);
  border-radius: 8px;
  color: #388fff !important;
}
.video-item .shipin {
  color: #333333;
  font-weight: bold;
}
.video-item .chapterName {
  font-size: 16px;
  font-weight: 400;
  color: #333333;
}
.video-itemIcon,
.item-name {
  float: left;
  padding-left: 10px;
}
.btn-learn {
  margin: 5px 5px 0 0;
  float: right;
  right: -100px;
  width: 80px;
  height: 30px;
  line-height: 30px;
  border: 0px;
  outline: none;
  color: #fff;
  background: #388fff;
  border-radius: 12px;
  cursor: pointer;
}
.clearfloat {
  clear: both;
}
/* 视频目录结束 */
.source {
  margin: 2px 0;
  padding: 5px;
  display: flex;
  justify-content: space-between;
  box-shadow: 0px 3px 6px rgba(0, 0, 0, 0.09);
}
.down {
  margin: 10px auto !important;
  width: 1200px;
  height: 100%;
  padding: 5px;
  background: #ffffff;
  box-sizing: border-box;
  border-radius: 8px;
}
.down:first-child {
  margin: 40px 0 5px 0;
}
.downloadbtn {
  width: 100px;
  height: 30px;
  line-height: 30px;
  background: #388fff;
  border: none;
  border-radius: 8px;
  color: #fff;
  font-size: 14px;
  cursor: pointer;
}
</style>